This chapter provides background information to teachers about remote sensing. Topics include the electromagnetic spectrum, sensors and platforms, scale and resolution, geographic information systems, and ground truthing images. The reading is...(View More) appropriate as well for high school students. The primer is part of the Ground Truth Studies Teacher Handbook, which provides more than 20 activities to build student understanding of global change and remote sensing, and includes background chapters for teachers, glossary, and appendices.(View Less)